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Related Concept Videos

Upsampling01:22

Upsampling

Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
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Related Experiment Video

Updated: May 13, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Nonlinear cross-talk mitigation in polychromatic parametric sampling gate.

Vahid Ataie1, Andreas O J Wiberg, Nikola Alic

  • 1Department of Electrical and Computer Engineering, University of California San Diego, 9500 Gilman Dr. La Jolla, California 92093, USA. vataie@ucsd.edu

Optics Express
|March 14, 2013
PubMed
Summary
This summary is machine-generated.

A new look-up table method cancels nonlinear cross-talk in polychromatic parametric sampling gates. This technique improves analog-to-digital conversion (ADC) performance by suppressing nonlinear responses.

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Last Updated: May 13, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

  • Photonics
  • Signal Processing
  • Analog-to-Digital Conversion

Background:

  • Nonlinear cross-talk degrades signal quality in polychromatic parametric sampling gates.
  • Parametric sampling operations can introduce undesirable nonlinear responses.
  • Existing methods struggle to effectively suppress these nonlinearities.

Purpose of the Study:

  • To introduce and quantify a novel technique for canceling nonlinear cross-talk.
  • To suppress nonlinear responses in parametric sampling operations.
  • To enhance the performance of parametric photonics-assisted analog-to-digital conversion (ADC).

Main Methods:

  • Development of a new look-up table method for signal equalization.
  • Implementation of the cancellation scheme within a copy-and-sample-all (CaSA) architecture.
  • Experimental validation of the technique in a parametric photonics ADC system.

Main Results:

  • The look-up table method effectively suppresses nonlinear responses.
  • A significant 20 dB improvement in total harmonic distortion was experimentally demonstrated.
  • The technique successfully mitigates nonlinear cross-talk in the CaSA architecture.

Conclusions:

  • The new look-up table method provides an effective solution for nonlinear cross-talk cancellation.
  • This technique substantially improves the linearity and performance of parametric sampling gates.
  • The demonstrated improvement in total harmonic distortion validates the method's practical applicability in ADC systems.